Making lapweld-tubing.



\NO- 796,938. PATENTEDAUG. a, 1905. G. SGHUHMANN w. H. MATHESON.

MAKING LAPWELD TUBING. APPLICATION FILED JA 1I. 2a, 1905.

ANDREW a mum rm, PnuYo-LITNOGRAPWEIIB. wAsmNGYnN. u. c.

UNITED STATES GEORGE SCHUHMANN AND JAMES H. MATHESON, OF READING, PENN-SYLVANIA.

MAKING LAPWELD-TUBING.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Original application filed December 20, 1904, Serial No. 287,660.Divided and this application filed January 28,1905. Serial No. 243,026.

To all whmn it may concern:

Be it known that we, GEORGE SCHUHMANN and JAMES H. MATH ESON, citizensof the United States, residing in Reading, county of Berks, State ofPennsylvania, have invented certain new and useful Improvements inMaking Lapweld-Tubing, of which the following is a specification.

Our invention relates particularly to the manufacture of high-gradelapweld-tubing which is regularly subjected to a second run through afurnace and welding apparatus to insure a more perfect and uniformproduct than results from the ordinary single run.

The apparatus for carrying the invention into effect is described andclaimed in our pending application, Serial No. 237,660, filed December20, 1904, of which this application is a division.

Heretofore the tube after its first welding run has frequently beenreturned hot to the furnace to reheat it for a second run, such-.echarging being efl'ected either at the front End of the furnace, fromwhich it was with- Firawn for its first run, or at the rear end, atwhich it was first charged, and the two runs being made either throughthe same welding k oils or through different welding-rolls. The 5)utputof double-run tubing is obviously inreased by employing differentwelding-rolls or the first and second runs; but heretofore hese haveeither been provided at different ends of the furnace or pair offurnaces employed or, where both are provided at the 'same (front) end,it has been required either hat the once-welded tube be carried back toche rear end for recharging or that it be car- "ed over interveningtroughs provided in 'nnection with the different weldingrolls andthecharging-opening for the purpose of recharging it and of thereafterdelivering it to the sizing-rolls, through which it is finally run.

The main object of our invention is to simplify and cheapen thedouble-run operation by avoiding all such carrying of the tubes and alsoproviding for a constant progression of the same from the originalcharging-point for the bent skelp through the several intermediate stepsof the operation to the sizingrolls, as hereinafter fully described inconnection with the accompanying drawing, the

novel features of the invention being specifically pointed out in theclaims.

The accompanying drawing is a plan view showing diagrammatically anapparatus for carrying out our invention.

The furnace, which may be of the usual regenerative type, is indicatedin horizontal section, the top portion being removed, 1 and 2representing the side Walls, 3 the rear end wall, 4 the front end wall,5 the hearth, and 6 the usual charging-opening in the rear end adjacentthe side wall 1. The usual sizingrolls 7 and sizing-trough 8 areindicated in front of the side wall portion 2 of the furnace.

In carrying out our invention we provide a first withdrawal-opening 9 inthe front wall approximately midway of the width of the furnace, asecond withdrawal-opening 10 in said wall adjacent to the side wall 2 ofthe furnace, and a recharging-opening 11, located intermediate of saidwithdrawal-openings, but nearer to the first withdrawal-opening 9, asshown. openings 9 and 10 we provide any ordinary welding-rolls (marked12 and 13, respectively) andwelding-troughs (marked 14 and15,respectively,) and in line with said recharging-opening 11 we providea charging-trough 16, preferably of the well-known elevating andreversing type, to permit of turning the once-welded tube end for endbefore recharging it into the furnace. The charging-opening 6 in therear end of the furnace may be extended across the furnace, so as toenable the operator-to conveniently roll the series of heating-skelpsand reheating-tubes laterally toward the opposite side wall 2 and topush the same through the withdrawal-openings as required.

The skelps are successively charged through the opening 6 into one sideof the furnace and gradually moved toward the opposite side un-- til inline with the first withdrawal-opening 9 and properly heated forwelding. They are then successively pushed through said opening 9 andinto the welding-rolls 12, through which they are passed over the usualball and mandrel-bar in the trough 14:. The mandrel-bar having beenwithdrawn, the tube is simply moved away from the weldingtrough 14: intothe adjacent charging-trough 16, the movement still being toward theopposite wall 2 of the furnace. The latter is In line with each of thewithdrawal- 1 then preferably temporarily raised by suitable means andswung so as to turn the tube end for end, and thereby provide forreversing the second run, as is customary, for the purpose of securing amore uniform product. The tube is then pushed into the furnace throughthe recharging-opening 11, and as it reheats it is again moved laterallytoward the opposite wall 2 until in line with the secondwithdrawal-opening 10, through which it is finally pushed out of thefurnace for its run through the second welding-rolls l3 and over theball as before. The withdrawal of the mandrel-bar leaves the reweldedtube in the second welding-trough 15, which is nearest to thesizing-trough 8 and in direct communication therewith, as in theordinary single-run apparatus, so that an additional lateral movement ofthe tube in the same direction as all previous movements thereofdelivers it to the sizing-trough, from which it passes to thesizing-rolls and finally to the straighteningrolls, as usual. It willthus be seen that the lateral movement of the tube during the repeatedoperations of charging and withdrawing is constantly in the samedirection and that the operation and mechanism are thereby muchsimplified and improved.

What we claim is The'improvement in manufacturing lapweld-tubing whichconsists in charging the bent-up skelp into a furnace on one side of thehearth thereof and thereafter constantly progressing the same toward theother side of the hearth during the successive operations of firstheating them for the first welding run, second of recharging them aftersuch run, third of reheating them for a second run, and finally, ofWithdrawing them from the other side of the hearth for the secondwelding run, the withdrawals for the two Welding runs and the rechargingbeing effected at the same end of the furnace.

In testimony whereof we afiix our signatures in the presence of twowitnesses.

GEORGE SCHUHMANN. JAIVIES H. MATHESON. Witnesses:

FRANK P. LONGSDORF, D. M. STEWART.

It is hereby certified that Letters Patent No. 796,938, granted August8, 1905, upon the application of George Schuhrnann and James H.Matheson, of Reading, Pennsylvania, For an improvement in Making LapweldTubing, was erroneously issued to said Schuhmann and Matheson as ownersof said invention; whereas the said Letters Patent should have beenissued to Reading Iron Company, Incorporated, of Reading, Pennsylvania,as owner of the entire interest in said invention, as shown by theassignments of record in this oflice; and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the case in the Patent Oflice.

Signed and scaled this 12th day of September, A. D., 1905.

[sEAL] F. I. ALLEN,

Commissioner of Patents.

then preferably temporarily raised by suitable means and swung so as toturn the tube end for end, and thereby provide for reversing the secondrun, as is customary, for the purpose of securing a more uniformproduct. The tube is then pushed into the furnace through therecharging-opening 11, and as it reheats it is again moved laterallytoward the opposite wall 2 until in line with the secondwithdrawal-opening 10, through which it is finally pushed out of thefurnace for its run through the second welding-rolls l3 and over theball as before. The withdrawal of the mandrel-bar leaves the reweldedtube in the second welding-trough 15, which is nearest to thesizing-trough 8 and in direct communication therewith, as in theordinary single-run apparatus, so that an additional lateral movement ofthe tube in the same direction as all previous movements thereofdelivers it to the sizing-trough, from which it passes to thesizing-rolls and finally to the straighteningrolls, as usual. It willthus be seen that the lateral movement of the tube during the repeatedoperations of charging and withdrawing is constantly in the samedirection and that the operation and mechanism are thereby muchsimplified and improved.

What we claim is The'improvement in manufacturing lapweld-tubing whichconsists in charging the bent-up skelp into a furnace on one side of thehearth thereof and thereafter constantly progressing the same toward theother side of the hearth during the successive operations of firstheating them for the first welding run, second of recharging them aftersuch run, third of reheating them for a second run, and finally, ofWithdrawing them from the other side of the hearth for the secondwelding run, the withdrawals for the two Welding runs and the rechargingbeing effected at the same end of the furnace.

In testimony whereof we afiix our signatures in the presence of twowitnesses.

GEORGE SCHUHMANN. JAIVIES H. MATHESON. Witnesses:

FRANK P. LONGSDORF, D. M. STEWART.

It is hereby certified that Letters Patent No. 796,938, granted August8, 1905, upon the application of George Schuhrnann and James H.Matheson, of Reading, Pennsylvania, For an improvement in Making LapweldTubing, was erroneously issued to said Schuhmann and Matheson as ownersof said invention; whereas the said Letters Patent should have beenissued to Reading Iron Company, Incorporated, of Reading, Pennsylvania,as owner of the entire interest in said invention, as shown by theassignments of record in this oflice; and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the case in the Patent Oflice.

Signed and scaled this 12th day of September, A. D., 1905.

[sEAL] F. I. ALLEN,

Commissioner of Patents.

JUI'FBCHOH In Leueis l'uwut IJO- 796,938.

It is hereby certified that Letters Patent No. 796,938, granted August8. 1905, upon the application of George Schuhmann and James H. Matheson,of Reading, Pennsylvania, for an improvement in Making Lapweld 'lubingx"was erroneously issued to said "Schuhimmn and Matheson as owners of saidinvention; whereas the said Letters Patent should have been issued to[feuding ron Company, lncorpo ated, of Reading, Pennsylvania, as ownerof H10 eniire intere t in Hlid invention, as shown by the assignments ofrecord in this ufiicv: and that \he said Letters Patent should be readwith this correction therein ihat lin' NHHP may uniform in the record ofthe case in \he Patent Ofiice.

Signed and seal d this 12th day 0| Npuanhur, A 1). 19ml [sliAL] F. I.ALLEN,

('ommissioner of Palenls.

